#习题13：参数，解包、变量
#运行时需要传3个参数进去，否则报以下信息：
"""
Traceback (most recent call last):
  File "demo13.py", line 3, in <module>
    script,first,second,third = argv;
ValueError: not enough values to unpack (expected 4, got 1)
"""
from sys import argv;
script,first,second,third = argv;
print ("The script is called:",script);
print ("Your first variable is:",first);
print ("Your second variable is:",second);
print ("Your third variable is:",third);